Install Ubuntu 14.04 on old/legacy PC, with "acpi=off". an Erik 1 year ago Install Ubuntu 14.04 on old/legacy PC, with "acpi=off". Install Ubuntu 14.04 on old/legacy PC, with “Disabling IRQ #9” http://android-er.blogspot.com/2014/07/install-ubuntu-1404-on-oldlegacy-pc.html